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-   -   08 Chevy 1500 P4020 (https://chevroletforum.com/forum/astro-28/08-chevy-1500-p4020-92838/)

krisreece October 29th, 2018 6:08 PM
08 Chevy 1500 P4020
 
i know that i need to replace an o2 sensor in my chevy. it says bank 1. i need to know which cat converter is bank one and whether or not i need to change the upstream or downstream sensor. anybody got anything?


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